55% (1983)

66% (1971)

72% (1980)

46% (1988)

60% (1980)

45% (1976)

45% (1989)

50% (1976)

56% (1975)

57% (1980)

61% (1980)

50% (1978)

45% (1975)

33% (1976)

60% (2007)

55% (1976)

51% (1970)

45% (1982)

46% (1982)

50% (1970)